In order to obtain constrained analogues of tryptophane, five-membered lactams and lactones bearing 4-indolyl and 3-carboxylic groups were prepared in a completely diastereoselective manner, resulting in a trans relationship. Furthermore, the use of chiral precursors in the synthesis yielded enantiomerically pure compounds with three contiguous chiral centres.
为了获得色
氨酸的约束类似物,五元内酰胺和内酯轴承以完全非对映选择性方式制备4-
吲哚基和3-羧基,产生反式关系。此外,在合成中使用手性前体产生具有三个连续手性中心的对映体纯的化合物。